/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2023. All rights reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef OCK_DFS_EVICT_HELPER_H
#define OCK_DFS_EVICT_HELPER_H

#include <mutex>
#include "dpax_list.h"

namespace ock {
namespace memfs {
struct EvictHelper {
    static int Initialize(list_head *head) noexcept;
    static void Destroy() noexcept;

    static std::recursive_mutex &GetLock() noexcept;

    EvictHelper() noexcept : listNode{ &listNode, &listNode } {}

    void AddToTail() noexcept;
    void MoveToTail() noexcept;
    void RemoveSelf() noexcept;

    list_head listNode;

private:
    static list_head *inodeHeader;
    static std::recursive_mutex mutexLock;
};
}
}

#endif // OCK_DFS_EVICT_HELPER_H
